1) If you have any store credit, you will need to use the credit before you can change countries in your account.

1) 如果你的帐户还有余额，你需要在变更国家之前把余额用完（据说最后剩下一点可以发邮件自愿放弃，他们可以给清掉

2) You will need to download all purchased content before changing countries. In addition, rented items must be past their 30 day expiration in order to change countries. For more information on rentals, please visit:
iTunes Store: Movie rental frequently asked questions (FAQ)http://support.apple.com/kb/HT1657

2) 你需要在变更国家之前下载所有购买的内容。除此之外，租赁的项目必须过了30天有效期才可以变更国家。更多有关租赁的信息请访问以上链接。

3) You will be asked to provide a payment method, such as a credit card or debit card associated with a valid billing address in the new country. An iTunes Store Gift Card issued in the new country is also an acceptable payment method. You will not be able to change your account’s country without providing one of these methods of payment.

4) Content purchased from the iTunes Store is country-specific. If you wish to upgrade any of your iTunes Store content to iTunes Plus, you’ll need to do so before you change the country associated with your account. The content you purchased while your account was set to the previous country will not be eligible for upgrade once you have changed countries.

5) When you change countries, you will no longer receive app update notifications on your iOS device or in iTunes for the apps you purchased in your original country. However, you will still be able to download those applications again for free if they are present on your new country’s store (even if they are updated). You will not be charged and the download will not appear on your Purchased page. If the app is not available in your new country, you will not be able to download it again for free.